* dwarf2out.c (stack_adjust_offset): Add support for POST_INC,

	POST_DEC, and POST_MODIFY.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@50121 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e631bab..1f9dd89 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2002-02-27  Andrew MacLeod  <amacleod@redhat.com>
+
+       * dwarf2out.c (stack_adjust_offset): Add support for POST_INC, 
+       POST_DEC, and POST_MODIFY.
+
 2002-02-27  Zack Weinberg  <zack@codesourcery.com>
 
        * c-typeck.c (digest_init): Remove unused parameter; all

diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index 315ac3a..9c0be46 100644 (file)
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -950,6 +950,8 @@ stack_adjust_offset (pattern)
        return 0;
 
       offset = INTVAL (XEXP (src, 1));
+      if (code == PLUS)
+       offset = -offset;
     }
   else if (GET_CODE (dest) == MEM)
     {
@@ -957,30 +959,47 @@ stack_adjust_offset (pattern)
       src = XEXP (dest, 0);
       code = GET_CODE (src);
 
-      if ((code != PRE_DEC && code != PRE_INC && code != PRE_MODIFY)
-         || XEXP (src, 0) != stack_pointer_rtx)
-       return 0;
+      switch (code) 
+        {
+       case PRE_MODIFY:
+       case POST_MODIFY:
+         if (XEXP (src, 0) == stack_pointer_rtx)
+           {
+             rtx val = XEXP (XEXP (src, 1), 1);
+             /* We handle only adjustments by constant amount.  */
+             if (GET_CODE (XEXP (src, 1)) != PLUS ||
+                 GET_CODE (val) != CONST_INT)
+               abort();
+             offset = -INTVAL (val);
+             break;
+           }
+         return 0;
 
-      if (code == PRE_MODIFY)
-       {
-         rtx val = XEXP (XEXP (src, 1), 1);
+       case PRE_DEC:
+       case POST_DEC:
+         if (XEXP (src, 0) == stack_pointer_rtx)
+           {
+             offset = GET_MODE_SIZE (GET_MODE (dest));
+             break;
+           }
+         return 0;
 
-         /* We handle only adjustments by constant amount.  */
-         if (GET_CODE (XEXP (src, 1)) != PLUS ||
-             GET_CODE (val) != CONST_INT)
-           abort ();
+       case PRE_INC:
+       case POST_INC:
+         if (XEXP (src, 0) == stack_pointer_rtx)
+           {
+             offset = -GET_MODE_SIZE (GET_MODE (dest));
+             break;
+           }
+         return 0;
 
-         offset = -INTVAL (val);
+       default:
+         return 0;
        }
-      else
-       offset = GET_MODE_SIZE (GET_MODE (dest));
     }
   else
     return 0;
 
-  if (code == PLUS || code == PRE_INC)
-    offset = -offset;
-
   return offset;
 }